A microcircuit tone generator for push-button dialing

This paper will describe a microelectronic tone generator whose output level is adjustable and stable to better than 1 dB, with operating line voltage ranging from 4.5 to 35 V dc; minimum supply current is 2 mA. Tantalum thin-film techniques used for filter, amplitude filter and amplifier.

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Bibliographic Details
Published in1972 IEEE International Solid-State Circuits Conference. Digest of Technical Papers Vol. XV; pp. 76 - 77
Main Author Cowpland, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1972
Subjects
Capacitors
Circuits
Filters
Impedance
Oscillators
Resistors
Resonant frequency
Schottky diodes
Temperature
Voltage
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Summary:This paper will describe a microelectronic tone generator whose output level is adjustable and stable to better than 1 dB, with operating line voltage ranging from 4.5 to 35 V dc; minimum supply current is 2 mA. Tantalum thin-film techniques used for filter, amplitude filter and amplifier.
DOI:10.1109/ISSCC.1972.1155029